Github user zsxwing commented on a diff in the pull request:
https://github.com/apache/spark/pull/11030#discussion_r52368999
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/ContinuousQuery.scala ---
@@ -17,14 +17,84 @@
package org.apache.spark.sql
+import org.apache.spark.annotation.Experimental
+
/**
+ * :: Experimental ::
* A handle to a query that is executing continuously in the background as
new data arrives.
+ * All these methods are thread-safe.
+ * @since 2.0.0
*/
+@Experimental
trait ContinuousQuery {
/**
- * Stops the execution of this query if it is running. This method
blocks until the threads
+ * Returns the name of the query.
+ * @since 2.0.0
+ */
+ def name: String
+
+ /**
+ * Returns the SQLContext associated with `this` query
+ * @since 2.0.0
+ */
+ def sqlContext: SQLContext
+
+ /**
+ * Whether the query is currently active or not
+ * @since 2.0.0
+ */
+ def isActive: Boolean
+
+ /**
+ * Returns the [[ContinuousQueryException]] if the query was terminated
by an exception.
+ * @since 2.0.0
+ */
+ def exception: Option[ContinuousQueryException]
+
+ /**
+ * Returns current status of all the sources.
+ * @since 2.0.0
+ */
+ def sourceStatuses: Array[SourceStatus]
+
+ /** Returns current status of the sink. */
+ def sinkStatus: SinkStatus
+
+ /**
+ * Waits for the termination of `this` query, either by `query.stop()`
or by an exception.
+ * If the query has terminated with an exception, then the exception
will be thrown.
+ *
+ * If the query has terminated, then all subsequent calls to this method
will either return
+ * `true` immediately (if the query was terminated by `stop()`), or
throw the exception
--- End diff --
nit: this method doesn't return a Boolean.
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